Proper nail placement is also a requirement for the shingles limited warranty coverage.
Proper way to nail roof shingles.
Then secure another nail an inch above each cutout.
Hammer one nail about 2 inches from each end of a shingle.
General guidelines for nailing shingles.
Nailing the shingles correctly is critical to the roof system s wind resistance.
You must place nails in the proper location and drive them flush with but not cutting into the shingle.
However make sure that you do not nail into the tar strip.
For all owens corning shingles roofing nails should penetrate into the wood deck by a minimum of inch or completely through the roof deck by a minimum of 1 8 inch.
Make sure to keep nails out of the tar strip as you work.
When nailing shingles proper penetration into the roof deck is essential to ensure the nail and shingle remain secure.
Also place a nail 2 inches from each end of the shingle in line with the other two.
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In all use four nails per 3 tab shingle.
So your next course of shingles should cover the nails by 1 inch vertically.
Be mindful of the proper nailing technique so that your nails always hold the top edge of the course beneath it.